3mm Red & Green LED Module Arduino Compatible

This module features a 3mm red/green LED with a common cathode. The LED can be used for the status indicator, perfect for indicating changes of state in your project. With PWM, you can adjust the lightness of each color to make the LED turn to other colors, such as Yellow.

Test Code

int redpin = 11; // select the pin for the red LED
int greenpin = 10; // select the pin for the green LED
int val;

void setup () {
pinMode(redpin, OUTPUT);
pinMode(greenpin, OUTPUT);
Serial.begin(9600);
}

void loop () {
for (val = 255; val > 0; val-- ) {
analogWrite(11, val);
analogWrite(10, 255-val);
delay(15);
}

for (val = 0; val < 255; val++) {
analogWrite(11, val);
analogWrite(10, 255-val);
delay(15);
}

Serial.println(val, DEC);
}